Changes between Version 3 and Version 4 of Documentation/UserGuide/ChangeCO2

Timestamp:

2020-02-28T10:53:53+01:00 (4 years ago)

Author:

aducharne

Comment:

--

Documentation/UserGuide/ChangeCO2

@@ -1 +1 @@
 = Change atmospheric CO2 scalar value =
 
-For offline simulations, the scalar value for atmospheric CO2 can be set in run.def using ATM_CO2=x, default value is 350. For constant value, set directly in run.def your choice. 
+Author: J. Ghattas\\
+Last revision: 2020/28/02, A. Ducharne
 
-For a annual change in CO2, using OOL_SEC_STO and libIGCM, you can add a ascii file with annual values and the driver will update ATM_CO2. The file has to be with following syntax : 
+For both offline and coupled simulations, the scalar value for atmospheric CO2 can be set in PARAM/run.def using ATM_CO2=x, with a default of 350 (ppm). 
+
+If you want to change for a constant value, set it directly in run.def, for example:
+{{{
+ATM_CO2 =  700.
+}}}
+
+For an annual change in CO2, using libIGCM, you can add an ascii file with annual values and the driver will update ATM_CO2. The file has to be written with the following syntax : 
 
 {{{
@@ -13 +21 @@
 }}}
 
-The file must be added to the input files and it must be called CO2.txt. To do so, add in stomate.card section !BoundaryFiles/!ListNonDel :
-
+The file must be added to the input files and it must be called CO2.txt. To do so, add a line like below in  section !BoundaryFiles/!ListNonDel, either in stomate.card for offline runs, or in lmdz.card for LMDZOR :
 {{{
 [BoundaryFiles]
@@ -20 +27 @@
 }}}
 
-You must set atmospheric  ATM_CO2 in PARAM/run.def to (do not comment it out):
+You must also keep the default setting of ATM_CO2 in PARAM/run.def (do not comment it out):
 {{{
 ATM_CO2 =  _AUTO_: DEFAULT = 350.
 }}}
 
-
-Files with CO2 values according to the CMIP5 and TRENDY2 protocole can be found at the shared repository. For exemple : 
+Files with CO2 values according to the CMIP6 and TRENDY2 protocol can be found at the shared repository. For exemple : 
 
 {{{
-basedir/IGCM/BC/ATM/LMDZOR/IPCC_AR5/RCPs/RCP85/CO2_1765_2500.txt
-basedir/IGCM/BC/ATM/LMDZOR/IPCC_AR5/HISTORIQUE/CO2_1765_2005.txt
-basedir/IGCM/BC/SRF/OL2/CO2_1860_2012_TRENDY2.txt
+basedir/ATM/GHG/CMIP6/ssp/ssp585/CO2_CMIP6_2015_2500.txt
+basedir/ATM/GHG/CMIP6/historical/CO2_CMIP6_0000_2014.txt
+basedir/SRF/CO2/CO2_1860_2012_TRENDY2.txt
 }}}
 
+where basedir (ending with IGCM) are defined for the various computing centers in https://forge.ipsl.jussieu.fr/igcmg_doc/wiki/Doc/ComputingCenters/SharedFiles
 
-where basedir [[BR]]
- * at curie, basedir=/ccc/work/cont003/dsm/p86ipsl
- * at ada, basedir=/workgpfs/rech/psl/rpsl035
- * at obelix, basedir=/home/orchidee01/mmancip (only protocole TRENDY2 at obelix)
-
-
-'''NB! ''' Note that if the year you simulate is not in the file, run.def will contain an empty variable "ATM_CO2=" and the model will of course crash.
+'''NB! ''' Note that if the year you simulate (with varying CO2) is not in the file, run.def will contain an empty variable "ATM_CO2=" and the model will of course crash.